Search Results - subject:"computation"

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Sliding mode for detection and accommodation of computation time delay fault

Garcia, José Paulo F.; Garcia, Lizete Maria C.F.; … - In: Mathematics and Computers in Simulation (MATCOM) 80 (2009) 2, pp. 449-465

Computation time delay in digital control systems reduces its robustness as well as degrades its performance. In this … paper, the computation time delay is assumed to be constant and smaller than the sampling time and is treated as a fault to … improves the systems’ performance when a computation time delay fault is found is proposed herein. A robust sliding mode …

Persistent link: https://www.econbiz.de/10011051068

Simulation of shallow-water systems using graphics processing units

Lastra, Miguel; Mantas, José M.; Ureña, Carlos; … - In: Mathematics and Computers in Simulation (MATCOM) 80 (2009) 3, pp. 598-618

This paper addresses the speedup of the numerical solution of shallow-water systems in 2D domains by using modern graphics processing units (GPUs). A first order well-balanced finite volume numerical scheme for 2D shallow-water systems is considered. The potential data parallelism of this method...

Persistent link: https://www.econbiz.de/10011051076

Darboux transformation and soliton solutions for the (2+1)-dimensional nonlinear Schrödinger hierarchy with symbolic computation

Zhang, Hai-Qiang; Tian, Bo; Li, Li-Li; Xue, Yu-Shan - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 1, pp. 9-20

In this paper, the N-fold Darboux transformation is applied to the Lax pair associated with the (2+1)-dimensional nonlinear Schrödinger hierarchy. The general explicit formula for N-soliton solution is derived in terms of Vandermonde-like determinant expression. On the zero background, two...

Persistent link: https://www.econbiz.de/10011058510

Solitonic solutions and Bäcklund transformation for the inhomogeneous N-coupled nonlinear Schrödinger equations

Meng, Xiang-Hua; Tian, Bo; Xu, Tao; Zhang, Hai-Qiang; … - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 2, pp. 209-217

Schrödinger equations are, with symbolic computation, analytically investigated in this paper. As one of the important integrable …

Persistent link: https://www.econbiz.de/10011060608

Sediment TMDL Development for the Amite River

Mishra, Pradeep; Deng, Zhi-Qiang - In: Water Resources Management 23 (2009) 5, pp. 839-852

) estimation of sediment loads (sources) due to watershed erosion, (3) river flow computation, and (4) determination of sediment … developed for computation of suspended cohesive sediment transport. Sediment erosion in the Amite River Basin is calculated by … flow computation is performed using the HEC-RAS software. The computed sediment concentration in the Amite River varies in …

Persistent link: https://www.econbiz.de/10010998055

A Dynamic Quality Ladder Model with Entry and Exit: Exploring the Equilibrium Correspondence Using the Homotopy Method

Borkovsky, Ron N.; Doraszelski, Ulrich; Kryukov, Yaroslav - C.E.P.R. Discussion Papers - 2009

This paper explores the equilibrium correspondence of a dynamic quality ladder model with entry and exit using the homotopy method. The homotopy method facilitates exploring the equilibrium correspondence in a systematic fashion; it is ideally suited for investigating the economic phenomena that...

Persistent link: https://www.econbiz.de/10008558580

Inference in Epidemic Models without Likelihoods

McKinley, Trevelyan; Cook, Alex; Deardon, Robert - In: International Journal of Biostatistics 5 (2009) 1, pp. 1171-1171

Likelihood-based inference for epidemic models can be challenging, in part due to difficulties in evaluating the likelihood. The problem is particularly acute in models of large-scale outbreaks, and unobserved or partially observed data further complicates this process. Here we investigate the...

Persistent link: https://www.econbiz.de/10005046659

Code analysis and parallelizing vector operations in R

Tierney, Luke - In: Computational Statistics 24 (2009) 2, pp. 217-223

Persistent link: https://www.econbiz.de/10004999499

The Life-Cycle Income Analysis Model (LIAM): A Study of a Flexible Dynamic Microsimulation Modelling Computing Framework

Cathal O’Donoghue; Lennon, John; Hynes, Stephen - Centre for Research on Pensions and Welfare Policies … - 2009

This paper describes a flexible computing framework designed to create a dynamic microsimulation model, the Life-cycle Income Analysis Model (LIAM). The principle computing characteristics include the degree of modularisation, parameterisation, generalisation and robustness. The paper describes...

Persistent link: https://www.econbiz.de/10005051739

Incomplete-Market Equilibria Solved Recursively on an Event Tree

Dumas, Bernard J; Lyasoff, Andrew - C.E.P.R. Discussion Papers - 2009

We develop a method that allows one to compute incomplete-market equilibria routinely for Markovian equilibria (when they exist). The main difficulty to be overcome arises from the set of state variables. There are, of course, exogenous state variables driving the economy but, in an incomplete...

Persistent link: https://www.econbiz.de/10005124234